Noise reduction bass generator

Abstract

The utility model relates to the technical field of generators, and discloses a noise-reduction bass generator, which comprises an end cover, a central cover plate of the end cover is provided with a shaft hole and a plurality of heat dissipation holes, and the plurality of heat dissipation holes are uniformly distributed along the circumferential direction of the shaft hole; meanwhile, a plurality of silencing plates are arranged in the end cover and are uniformly distributed in the circumferential direction of the shaft hole; each silencing plate is arranged along the radial direction of the shaft hole and is fixedly connected with the central cover plate; arc-shaped noise reduction cotton is arranged between every two adjacent noise reduction plates, and each arc-shaped noise reduction cotton is fixedly connected with the corresponding end cover. And two adjacent silencing plates and the silencing cotton between the two adjacent silencing plates form a silencing cavity. According to the utility model, the end cover is internally provided with a plurality of silencing cavities formed by two adjacent silencing plates and silencing cotton, noise generated by the generator impacts on the silencing cotton, part of the noise is absorbed, part of the noise is reflected, the reflected noise impacts on the silencing plates and is attenuated, and then the noise is reflected back to the silencing cotton, so that reciprocating multi-frequency silencing is realized, and the noise reduction efficiency is improved. The silencing effect is greatly improved, and noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and in particular to a noise-reducing low-frequency generator. Background Technology

[0002] The generator is the main power source for a car. When the engine is running normally, it supplies power to all electrical devices and charges the battery.

[0003] The noise-reducing end cap described in announcement number CN213461383U includes an end cap and a shaft hole. The end cap is integrally formed by an annular plate and a base plate. The shaft hole is located inside the base plate, and the central axis of the shaft hole coincides with the central axis of the base plate. A circular groove is provided on one side of the base plate near the annular plate, and the circular groove communicates with the shaft hole. The central axis of the circular groove coincides with the central axis of the shaft hole. A circumferential groove is provided in the inner wall of the circular groove, and a first sound-absorbing cotton is installed in the circumferential groove. Several heat dissipation holes are provided on the base plate, and the heat dissipation holes communicate with the circular groove. A dustproof net is inserted into the insertion hole through an insert block, and then the dustproof net is fixed to the base plate with bolts.

[0004] Based on the above technical features, the problem is that in the existing technology, the first sound-absorbing cotton and the second sound-absorbing cotton have limited ability to absorb sound, and a large amount of sound waves escape from the heat dissipation holes, resulting in poor noise reduction performance.

[0005] Therefore, it is necessary to solve the above problems by using a noise-reducing low-frequency generator. Utility Model Content

[0006] The purpose of this invention is to provide a noise-reducing low-frequency generator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a noise-reducing bass generator, comprising an end cover, wherein a shaft hole and multiple heat dissipation holes are formed on the central cover plate of the end cover, the multiple heat dissipation holes being evenly distributed along the circumference of the shaft hole; simultaneously, multiple sound-absorbing plates are provided inside the end cover, the multiple sound-absorbing plates being evenly distributed along the circumference of the shaft hole; each sound-absorbing plate is arranged radially along the shaft hole and is fixedly connected to the central cover plate; an arc-shaped sound-absorbing cotton is provided between two adjacent sound-absorbing plates, each arc-shaped sound-absorbing cotton being fixedly connected to the end cover; two adjacent sound-absorbing plates and the sound-absorbing cotton located between them together form a sound-absorbing chamber.

[0008] Preferably, the arc-shaped sound-absorbing cotton is an arc-shaped egg-shaped cotton.

[0009] Preferably, the sound-absorbing plate is a corrugated plate and is made of nitrile rubber.

[0010] Preferably, a filter plate is installed on the end cap, and the filter plate has through holes that correspond to the shaft holes; the filter plate covers all heat dissipation holes.

[0011] Preferably, the filter plate is connected to the end cap by bolts; a spring washer is fitted on the bolt, and the spring washer is located between the bolt head and the filter plate.

[0012] Preferably, the silencing chamber corresponds one-to-one with the heat dissipation hole.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] First, the end cap of this utility model is provided with multiple sound-absorbing chambers composed of two adjacent sound-absorbing plates and sound-absorbing cotton. When the noise waves generated by the generator hit the sound-absorbing cotton, part of them are absorbed and part of them are reflected. After the reflected noise waves hit the sound-absorbing plates and attenuate, they are reflected back to the sound-absorbing cotton again. This cycle repeats multiple times to absorb noise, which greatly improves the sound absorption effect and reduces noise.

[0015] Secondly, a spring washer is provided between the filter plate and the head of the bolt in this utility model, which can effectively prevent the filter plate from loosening and reduce noise sources. Attached Figure Description

[0016] Figure 1 This is a three-dimensional assembly diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the interior of the end cap of this utility model;

[0018] Figure 3 This is an exploded view of the filter plate of this utility model.

[0019] In the diagram: 1. Shell; 2. End cap; 3. Filter plate; 4. Bolt; 5. Heat dissipation hole; 6. Sound-absorbing cotton; 7. Spring washer; 8. Sound-absorbing plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figures 1 to 3 The illustrated noise-reducing low-frequency generator includes an end cap 2. The end cap 2 is mounted on the tail housing 1 of the generator.

[0022] A shaft hole is formed on the center cover plate of end cover 2, through which the output shaft of the generator coaxially passes. Simultaneously, multiple heat dissipation holes 5 are formed on the center cover plate of end cover 2; in this embodiment, the number of heat dissipation holes 5 is specifically four. The four heat dissipation holes 5 are evenly distributed along the circumference of the shaft hole for heat dissipation.

[0023] A filter plate 3 is fixedly connected to the center cover plate of end cover 2 by four bolts 4. The filter plate 3 is located at the end of end cover 2 away from housing 1. A through hole is opened on the filter plate 3, which corresponds to the shaft hole, and the output shaft of the generator passes through the through hole coaxially.

[0024] Four insertion holes are made on the filter plate 3, and the four insertion holes are evenly distributed around the circumference of the perforation. Four threaded holes are made on the center cover plate of the end cap 2, and the four threaded holes correspond one-to-one with the four insertion holes. A bolt 4 is inserted into each of the four insertion holes, and the bolt 4 is threadedly connected to the threaded hole.

[0025] A spring washer 7 is fitted onto each bolt 4, located between the bolt head and the filter plate 3. This is to prevent the filter plate 3 from loosening.

[0026] The filter plate 3 covers all the heat dissipation holes 5, which serves both to dissipate heat and to prevent debris from entering the generator.

[0027] Multiple sound-absorbing plates 8 are installed inside the end cap 2. In this embodiment, the number of sound-absorbing plates 8 is specifically four. The four sound-absorbing plates 8 are evenly distributed around the circumference of the shaft hole, and each sound-absorbing plate 8 is arranged radially along the shaft hole and extends axially along the shaft hole.

[0028] A sound-absorbing plate 8 is installed between two adjacent heat dissipation holes 5, and an arc-shaped sound-absorbing cotton 6 is installed between two adjacent sound-absorbing plates 8. Each sound-absorbing plate 8 is fixedly connected to the center cover plate of the end cover 2, and each piece of sound-absorbing cotton 6 is glued to the inner curved surface of the end cover 2.

[0029] The two adjacent sound-absorbing plates 8 and the sound-absorbing cotton 6 between them together form a sound-absorbing chamber, and the sound-absorbing chamber corresponds one-to-one with the heat dissipation hole 5.

[0030] Each silencing plate 8 is a corrugated plate, and all are made of nitrile rubber. Each silencing plate 8 has double-sided corrugations, with each corrugation corresponding to a silencing chamber. Each corrugation is composed of multiple semi-cylindrical rods evenly arranged. The multiple semi-cylindrical rods are parallel to each other and integrally formed with the silencing plate 8. The multiple semi-cylindrical rods can be arranged in a linear array evenly along the radial or axial direction of the shaft hole.

[0031] Each piece of sound-absorbing cotton (6) is made of egg-shaped cotton, and the egg-shaped protrusions of each piece face the output shaft of the generator. It is used for noise reduction.

[0032] Working principle: During operation, the noise generated by the generator reaches the silencing chamber from all directions. Some of the noise impacts the sound-absorbing cotton 6 and is absorbed by it. Another portion of the noise impacts the sound-absorbing plate 8; the attenuated noise is reflected by the sound-absorbing plate 8 and then impacts the sound-absorbing cotton 6, where it is also absorbed.

[0033] The noise impacting the sound-absorbing cotton 6 is partially absorbed by the cotton 6, and the rest is reflected by the cotton 6 and then impacts the sound-absorbing plate 8. The noise is weakened by the sound-absorbing plate 8 and then reflected again to impact the cotton 6. This process is repeated multiple times to absorb and attenuate the noise, reducing noise escape. This achieves the goal of reducing generator noise.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A noise-reducing bass generator, comprising an end cap (2), characterized in that: The end cap (2) has a shaft hole and multiple heat dissipation holes (5) on its central cover plate. The multiple heat dissipation holes (5) are evenly distributed along the circumference of the shaft hole. At the same time, multiple sound-absorbing plates (8) are provided inside the end cap (2). The multiple sound-absorbing plates (8) are evenly distributed along the circumference of the shaft hole. Each sound-absorbing plate (8) is arranged radially along the shaft hole and is fixedly connected to the central cover plate. An arc-shaped sound-absorbing cotton (6) is provided between two adjacent sound-absorbing plates (8). Each arc-shaped sound-absorbing cotton (6) is fixedly connected to the end cap (2). The two adjacent sound-absorbing plates (8) and the sound-absorbing cotton (6) located between them together form a sound-absorbing chamber.

2. The noise-reducing bass generator according to claim 1, characterized in that: The arc-shaped sound-absorbing cotton (6) is an arc-shaped egg cotton.

3. The noise-reducing bass generator according to claim 1, characterized in that: The sound-absorbing plate (8) is a corrugated plate and is made of nitrile rubber.

4. The noise-reducing bass generator according to claim 1, characterized in that: A filter plate (3) is installed on the end cap (2), and a through hole is opened on the filter plate (3), which corresponds to the shaft hole; the filter plate (3) covers all heat dissipation holes (5).

5. A noise-reducing bass generator according to claim 4, characterized in that: The filter plate (3) is connected to the end cap (2) by bolts (4); a spring washer (7) is fitted on the bolt (4), and the spring washer (7) is located between the head of the bolt (4) and the filter plate (3).

6. A noise-reducing bass generator according to claim 1, characterized in that: The silencing chamber corresponds one-to-one with the heat dissipation hole (5).

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